blob: 59352f71d4f9450a54b3572702c5fcc042cf8761 [file] [log] [blame]
/* Copyright (C) 2000, 2003, 2005, 2009 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <sysdep.h>
#define EINVAL 22
#ifdef __ARMEB__
# define LOW_OFFSET 8 + 4
/* The initial + 4 is for the stack postdecrement. */
# define HIGH_OFFSET 4 + 8 + 0
#else
# define LOW_OFFSET 8 + 0
# define HIGH_OFFSET 4 + 8 + 4
#endif
/* The mmap2 system call takes six arguments, all in registers. */
.text
ENTRY (__mmap64)
ldr ip, [sp, $LOW_OFFSET]
str r5, [sp, #-4]!
cfi_adjust_cfa_offset (4)
cfi_rel_offset (r5, 0)
ldr r5, [sp, $HIGH_OFFSET]
str r4, [sp, #-4]!
cfi_adjust_cfa_offset (4)
cfi_rel_offset (r4, 0)
cfi_remember_state
movs r4, ip, lsl $20 @ check that offset is page-aligned
mov ip, ip, lsr $12
moveqs r4, r5, lsr $12 @ check for overflow
bne .Linval
ldr r4, [sp, $8] @ load fd
orr r5, ip, r5, lsl $20 @ compose page offset
DO_CALL (mmap2, 0)
cmn r0, $4096
ldmfd sp!, {r4, r5}
cfi_adjust_cfa_offset (-8)
cfi_restore (r4)
cfi_restore (r5)
RETINSTR(cc, lr)
b PLTJMP(syscall_error)
cfi_restore_state
.Linval:
mov r0, $-EINVAL
ldmfd sp!, {r4, r5}
cfi_adjust_cfa_offset (-8)
cfi_restore (r4)
cfi_restore (r5)
b PLTJMP(syscall_error)
PSEUDO_END (__mmap64)
weak_alias (__mmap64, mmap64)